Friendly FireG 15

Welcome

To posses an enemy you need a skill called "Posses Small" this can randomly shows when you get the chance to upgrade but if you want to knock this out early or you are having troubles with it not showing up then when you complete a level and you get the chance to upgrade go and check the skills available if it's not there on Xbox 1 just dashboard and on PC go to desktop and force close the game, When you lunch the game again you will get the chance again to upgrade but with different board set and also different skills just keep doing this until it shows up.

Update: After i got "Posses Small" skill after few upgrades "Posses Medium" skill appeared it's much easier to do the achievement by possessing medium enemies.